Abstract: A chain for a bicycle, a sprocket cassette, a chainring, a crankset, a chain drive system, and a bicycle are provided. The chain comprises a plurality of interleaved link elements, each link element being pivotably attached to at least one other link element and comprising at least two teeth. A flank of each tooth is adapted to engage with a flank of a sprocket tooth. The sprocket cassette comprises one or more sprockets, each comprising a plurality of sprocket teeth, wherein each sprocket tooth has a flank with a profile corresponding to a profile of at least part of a tooth of each of the plurality of link elements. The chainring comprises a plurality of sprocket drive teeth having a profile corresponding to the profile of at least one of the teeth of each of the plurality of link elements.

Abstract: A chain for a bicycle, a sprocket cassette, a chainring, a crankset, a chain drive system, and a bicycle are provided. The chain comprises a plurality of interleaved link elements, each link element being pivotably attached to at least one other link element and comprising at least two teeth. A flank of each tooth is adapted to engage with a flank of a sprocket tooth. The sprocket cassette comprises one or more sprockets, each comprising a plurality of sprocket teeth, wherein each sprocket tooth has a flank with a profile corresponding to a profile of at least part of a tooth of each of the plurality of link elements. The chainring comprises a plurality of sprocket drive teeth having a profile corresponding to the profile of at least one of the teeth of each of the plurality of link elements.

Abstract: The invention relates to the improvement of visual performance, particularly of visual performance in the darkness, by administration of a colorant that is capable of being incorporated into eye tissue and/or causing yellowing of eye tissue, especially carotenoids, such as lutein and zeaxanthin.

Abstract: The invention relates to the improvement of visual performance, particularly of visual performance in the darkness, by administration of a colorant that is capable of being incorporated into eye tissue and/or causing yellowing of eye tissue, especially carotenoids, such as lutein and zeaxanthin.

Abstract: The invention relates to the improvement of visual performance, particularly of visual performance in the darkness, by administration of a colorant that is capable of being incorporated into eye tissue and/or causing yellowing of eye tissue, especially carotenoids, such as lutein and zeaxanthin.

Abstract: A device for examining for the eyeground of a patient's eye (1) has a head holder (3) for fixing the patient's head and a slit lamp unit (19 or 22). Provided on the head holder is a laterally movable lens carriage (9), in the shaft guide (10) of which a lens holder (11) can be introduced with its shaft (27) from above. For positioning the lens (12) in front of the eye (1), the lens holder is coupled in terms of movement to the microscope by means of an adapter (25) and a guide plate (24). The lens carriage, the lens holder and the adapter or the guide plate are in this case formed in such a way that the lens holder can be spatially fixed and uncoupled from the microscope with few manipulations, which makes it possible for an image of the eyeground to be formed the microscope in an optimum way.

Abstract: The invention relates to the improvement of visual performance, particularly of visual performance in the darkness, by administration of a colorant that is capable of being incorporated into eye tissue and/or causing yellowing of eye tissue, especially carotenoids, such as lutein and zeaxanthin.

Abstract: A device for examining for the eyeground of a patient's eye (1) has a head holder (3) for fixing the patient's head and a slit lamp unit (19 or 22). Provided on the head holder is a laterally movable lens carriage (9), in the shaft guide (10) of which a lens holder (11) can be introduced with its shaft (27) from above. For positioning the lens (12) in front of the eye (1), the lens holder is coupled in terms of movement to the microscope by means of an adapter (25) and a guide plate (24). The lens carriage, the lens holder and the adapter or the guide plate are in this case formed in such a way that the lens holder can be spatially fixed and uncoupled from the microscope with few manipulations, which makes it possible for an image of the eyeground to be formed the microscope in an optimum way.